# CVE-2025-34095: Mako Server v2.5 and v2.6 OS Command Injection via examples/save.lsp

> Unauthenticated attackers can execute arbitrary OS commands via crafted requests to the Mako Server tutorial interface, affecting Windows and Unix deployments.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Jul 2025
- **Updated:** 14 May 2026
- **Also known as:** GHSA-fh7x-m234-3vg3

## What is CVE-2025-34095?

CVE-2025-34095 is a critical command injection vulnerability in Real Time Logic Mako Server, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An OS command injection vulnerability exists in Mako Server versions 2.5 and 2.6, specifically within the tutorial interface provided by the examples/save.lsp endpoint. An unauthenticated attacker can send a crafted PUT request containing arbitrary Lua os.execute() code, which is then persisted on disk and triggered via a subsequent GET request to examples/manage.lsp. This allows remote command execution on the underlying operating system, impacting both Windows and Unix-based deployments.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2025-34095?


## How do I fix CVE-2025-34095?

No fix has been published for CVE-2025-34095 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34095 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34095 exists.

Public exploit code:

- Mako Server v2.5, 2.6 OS Command Injection RCE (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34095 and fix it if it is affected.

What it is: CVE-2025-34095 is a critical command injection vulnerability in Real Time Logic Mako Server, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34095 exists.

Affected product: Real Time Logic Mako Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-34095/ (Markdown: https://insights.sbomify.com/CVE-2025-34095/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34095
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34095
- OSV: https://osv.dev/vulnerability/CVE-2025-34095

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34095/
Summaries are generated and may contain mistakes; the official description above is the record.